Improve category names for algebra questions.

samplequestions/stacklibrary/Algebra-Refresher/01-Combinations-of-arithmetic-operations/gitsync_category.xml

@@ -2,7 +2,7 @@
 <quiz>
   <question type="category">
     <category>
-      <text>top/stacklibrary/Algebra-Refresher/1. Combinations of arithmetic operations</text>
+      <text>top/stacklibrary/Algebra-Refresher/01. Combinations of arithmetic operations</text>
     </category>
     <info format="moodle_auto_format">
       <text/>

samplequestions/stacklibrary/Algebra-Refresher/02-Factorisation-of-whole-numbers/gitsync_category.xml

@@ -2,7 +2,7 @@
 <quiz>
   <question type="category">
     <category>
-      <text>top/stacklibrary/Algebra-Refresher/2. Factorisation of whole numbers</text>
+      <text>top/stacklibrary/Algebra-Refresher/02. Factorisation of whole numbers</text>
     </category>
     <info format="moodle_auto_format">
       <text/>

samplequestions/stacklibrary/Algebra-Refresher/03-Addition-and-subtraction-of-fractions/gitsync_category.xml

@@ -2,7 +2,7 @@
 <quiz>
   <question type="category">
     <category>
-      <text>top/stacklibrary/Algebra-Refresher/3. Addition and subtraction of fractions</text>
+      <text>top/stacklibrary/Algebra-Refresher/03. Addition and subtraction of fractions</text>
     </category>
     <info format="moodle_auto_format">
       <text/>

samplequestions/stacklibrary/Algebra-Refresher/04-Multiplication-and-division-of-fractions/gitsync_category.xml

@@ -2,7 +2,7 @@
 <quiz>
   <question type="category">
     <category>
-      <text>top/stacklibrary/Algebra-Refresher/4. Multiplication and division of fractions</text>
+      <text>top/stacklibrary/Algebra-Refresher/04. Multiplication and division of fractions</text>
     </category>
     <info format="moodle_auto_format">
       <text/>

samplequestions/stacklibrary/Algebra-Refresher/05-Combinations-of-arithmetic-operations-on-fractions/gitsync_category.xml

@@ -2,7 +2,7 @@
 <quiz>
   <question type="category">
     <category>
-      <text>top/stacklibrary/Algebra-Refresher/5. Combinations of arithmetic operations on fractions</text>
+      <text>top/stacklibrary/Algebra-Refresher/05. Combinations of arithmetic operations on fractions</text>
     </category>
     <info format="moodle_auto_format">
       <text/>

samplequestions/stacklibrary/Algebra-Refresher/06-Simplifying-algebraic-expressions/gitsync_category.xml

@@ -2,7 +2,7 @@
 <quiz>
   <question type="category">
     <category>
-      <text>top/stacklibrary/Algebra-Refresher/6. Simplifying algebraic expressions</text>
+      <text>top/stacklibrary/Algebra-Refresher/06. Simplifying algebraic expressions</text>
     </category>
     <info format="moodle_auto_format">
       <text/>

samplequestions/stacklibrary/Algebra-Refresher/07-Removing-brackets/gitsync_category.xml

@@ -2,7 +2,7 @@
 <quiz>
   <question type="category">
     <category>
-      <text>top/stacklibrary/Algebra-Refresher/7. Removing brackets</text>
+      <text>top/stacklibrary/Algebra-Refresher/07. Removing brackets</text>
     </category>
     <info format="moodle_auto_format">
       <text/>

samplequestions/stacklibrary/Algebra-Refresher/08-Algebraic-fractions/gitsync_category.xml

@@ -2,7 +2,7 @@
 <quiz>
   <question type="category">
     <category>
-      <text>top/stacklibrary/Algebra-Refresher/8. Algebraic fractions</text>
+      <text>top/stacklibrary/Algebra-Refresher/08. Algebraic fractions</text>
     </category>
     <info format="moodle_auto_format">
       <text/>

samplequestions/stacklibrary/Algebra-Refresher/09-Linear-equations/gitsync_category.xml

@@ -2,7 +2,7 @@
 <quiz>
   <question type="category">
     <category>
-      <text>top/stacklibrary/Algebra-Refresher/9. Linear equations</text>
+      <text>top/stacklibrary/Algebra-Refresher/09. Linear equations</text>
     </category>
     <info format="moodle_auto_format">
       <text/>