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diff --git a/school/node_modules/ranges-push/dist/ranges-push.esm.js b/school/node_modules/ranges-push/dist/ranges-push.esm.js
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+++ b/school/node_modules/ranges-push/dist/ranges-push.esm.js
@@ -0,0 +1,150 @@
+/**
+ * @name ranges-push
+ * @fileoverview Gather string index ranges
+ * @version 5.1.0
+ * @author Roy Revelt, Codsen Ltd
+ * @license MIT
+ * {@link https://codsen.com/os/ranges-push/}
+ */
+
+import { collWhitespace } from 'string-collapse-leading-whitespace';
+import { rMerge } from 'ranges-merge';
+
+var version$1 = "5.1.0";
+
+const version = version$1;
+function existy(x) {
+  return x != null;
+}
+function isNum(something) {
+  return Number.isInteger(something) && something >= 0;
+}
+function isStr(something) {
+  return typeof something === "string";
+}
+const defaults = {
+  limitToBeAddedWhitespace: false,
+  limitLinebreaksCount: 1,
+  mergeType: 1
+};
+class Ranges {
+  constructor(originalOpts) {
+    const opts = { ...defaults,
+      ...originalOpts
+    };
+    if (opts.mergeType && opts.mergeType !== 1 && opts.mergeType !== 2) {
+      if (isStr(opts.mergeType) && opts.mergeType.trim() === "1") {
+        opts.mergeType = 1;
+      } else if (isStr(opts.mergeType) && opts.mergeType.trim() === "2") {
+        opts.mergeType = 2;
+      } else {
+        throw new Error(`ranges-push: [THROW_ID_02] opts.mergeType was customised to a wrong thing! It was given of a type: "${typeof opts.mergeType}", equal to ${JSON.stringify(opts.mergeType, null, 4)}`);
+      }
+    }
+    this.opts = opts;
+    this.ranges = [];
+  }
+  add(originalFrom, originalTo, addVal) {
+    if (originalFrom == null && originalTo == null) {
+      return;
+    }
+    if (existy(originalFrom) && !existy(originalTo)) {
+      if (Array.isArray(originalFrom)) {
+        if (originalFrom.length) {
+          if (originalFrom.some(el => Array.isArray(el))) {
+            originalFrom.forEach(thing => {
+              if (Array.isArray(thing)) {
+                this.add(...thing);
+              }
+            });
+            return;
+          }
+          if (originalFrom.length && isNum(+originalFrom[0]) && isNum(+originalFrom[1])) {
+            this.add(...originalFrom);
+          }
+        }
+        return;
+      }
+      throw new TypeError(`ranges-push/Ranges/add(): [THROW_ID_12] the first input argument, "from" is set (${JSON.stringify(originalFrom, null, 0)}) but second-one, "to" is not (${JSON.stringify(originalTo, null, 0)})`);
+    } else if (!existy(originalFrom) && existy(originalTo)) {
+      throw new TypeError(`ranges-push/Ranges/add(): [THROW_ID_13] the second input argument, "to" is set (${JSON.stringify(originalTo, null, 0)}) but first-one, "from" is not (${JSON.stringify(originalFrom, null, 0)})`);
+    }
+    const from = +originalFrom;
+    const to = +originalTo;
+    if (isNum(addVal)) {
+      addVal = String(addVal);
+    }
+    if (isNum(from) && isNum(to)) {
+      if (existy(addVal) && !isStr(addVal) && !isNum(addVal)) {
+        throw new TypeError(`ranges-push/Ranges/add(): [THROW_ID_08] The third argument, the value to add, was given not as string but ${typeof addVal}, equal to:\n${JSON.stringify(addVal, null, 4)}`);
+      }
+      if (existy(this.ranges) && Array.isArray(this.last()) && from === this.last()[1]) {
+        this.last()[1] = to;
+        if (this.last()[2] === null || addVal === null) ;
+        if (this.last()[2] !== null && existy(addVal)) {
+          let calculatedVal = this.last()[2] && this.last()[2].length > 0 && (!this.opts || !this.opts.mergeType || this.opts.mergeType === 1) ? this.last()[2] + addVal : addVal;
+          if (this.opts.limitToBeAddedWhitespace) {
+            calculatedVal = collWhitespace(calculatedVal, this.opts.limitLinebreaksCount);
+          }
+          if (!(isStr(calculatedVal) && !calculatedVal.length)) {
+            this.last()[2] = calculatedVal;
+          }
+        }
+      } else {
+        if (!this.ranges) {
+          this.ranges = [];
+        }
+        const whatToPush = addVal !== undefined && !(isStr(addVal) && !addVal.length) ? [from, to, addVal && this.opts.limitToBeAddedWhitespace ? collWhitespace(addVal, this.opts.limitLinebreaksCount) : addVal] : [from, to];
+        this.ranges.push(whatToPush);
+      }
+    } else {
+      if (!(isNum(from) && from >= 0)) {
+        throw new TypeError(`ranges-push/Ranges/add(): [THROW_ID_09] "from" value, the first input argument, must be a natural number or zero! Currently it's of a type "${typeof from}" equal to: ${JSON.stringify(from, null, 4)}`);
+      } else {
+        throw new TypeError(`ranges-push/Ranges/add(): [THROW_ID_10] "to" value, the second input argument, must be a natural number or zero! Currently it's of a type "${typeof to}" equal to: ${JSON.stringify(to, null, 4)}`);
+      }
+    }
+  }
+  push(originalFrom, originalTo, addVal) {
+    this.add(originalFrom, originalTo, addVal);
+  }
+  current() {
+    if (Array.isArray(this.ranges) && this.ranges.length) {
+      this.ranges = rMerge(this.ranges, {
+        mergeType: this.opts.mergeType
+      });
+      if (this.ranges && this.opts.limitToBeAddedWhitespace) {
+        return this.ranges.map(val => {
+          if (existy(val[2])) {
+            return [val[0], val[1], collWhitespace(val[2], this.opts.limitLinebreaksCount)];
+          }
+          return val;
+        });
+      }
+      return this.ranges;
+    }
+    return null;
+  }
+  wipe() {
+    this.ranges = [];
+  }
+  replace(givenRanges) {
+    if (Array.isArray(givenRanges) && givenRanges.length) {
+      if (!(Array.isArray(givenRanges[0]) && isNum(givenRanges[0][0]))) {
+        throw new Error(`ranges-push/Ranges/replace(): [THROW_ID_11] Single range was given but we expected array of arrays! The first element, ${JSON.stringify(givenRanges[0], null, 4)} should be an array and its first element should be an integer, a string index.`);
+      } else {
+        this.ranges = Array.from(givenRanges);
+      }
+    } else {
+      this.ranges = [];
+    }
+  }
+  last() {
+    if (Array.isArray(this.ranges) && this.ranges.length) {
+      return this.ranges[this.ranges.length - 1];
+    }
+    return null;
+  }
+}
+
+export { Ranges, defaults, version };