doc: make parameter names consistent in docs for std.substr

Author: johnbartholomew

doc/_stdlib_gen/stdlib-content.jsonnet

@@ -219,14 +219,14 @@ local exampleDocMultiline(mid, ex) =
           availableSince: '0.10.0',
           description: html.paragraphs([
             |||
-              Returns a string that is the part of <code>s</code> that starts at offset <code>from</code>
-              and is <code>len</code> codepoints long. If the string <code>s</code> is shorter than
+              Returns a string that is the part of <code>str</code> that starts at offset <code>from</code>
+              and is <code>len</code> codepoints long. If the string <code>str</code> is shorter than
               <code>from+len</code>, the suffix starting at position <code>from</code> will be returned.
             |||,
             |||
-              The slice operator (e.g., <code>s[from:to]</code>) can also be used on strings, as an alternative
-              to this function. However, note that the slice operator takes a start and an end index, but
-              <code>std.substr</code> takes a start index and a length.
+              The slice operator (e.g., <code>str[from:to]</code>) can also be used on strings, as an
+              alternative to this function. However, note that the slice operator takes a start and an
+              end index, but <code>std.substr</code> takes a start index and a length.
             |||,
           ]),
         },

doc/ref/stdlib.html

@@ -463,14 +463,14 @@ <h4 id="substr">
         </em>
       </p>
       <p>
-        Returns a string that is the part of <code>s</code> that starts at offset <code>from</code>
-        and is <code>len</code> codepoints long. If the string <code>s</code> is shorter than
+        Returns a string that is the part of <code>str</code> that starts at offset <code>from</code>
+        and is <code>len</code> codepoints long. If the string <code>str</code> is shorter than
         <code>from+len</code>, the suffix starting at position <code>from</code> will be returned.
       </p>
       <p>
-        The slice operator (e.g., <code>s[from:to]</code>) can also be used on strings, as an alternative
-        to this function. However, note that the slice operator takes a start and an end index, but
-        <code>std.substr</code> takes a start index and a length.
+        The slice operator (e.g., <code>str[from:to]</code>) can also be used on strings, as an
+        alternative to this function. However, note that the slice operator takes a start and an
+        end index, but <code>std.substr</code> takes a start index and a length.
       </p>
 
     </div>