Sync HACKING and hacking.html.in

After one last-minute change, only HACKING was updated and not
hacking.html.in, so this patch synchronizes that.

docs/hacking.html.in

@@ -241,7 +241,7 @@
     <p>
       The keywords <code>if</code>, <code>for</code>, <code>while</code>,
       and <code>switch</code> must have a single space following them
-      before the opening bracket. e.g.
+      before the opening bracket. E.g.
     </p>
     <pre>
       if(foo)   // Bad
@@ -250,7 +250,7 @@
 
     <p>
       Function implementations must <strong>not</strong> have any whitespace
-      between the function name and the opening bracket. e.g.
+      between the function name and the opening bracket. E.g.
     </p>
     <pre>
       int foo (int wizz)  // Bad
@@ -259,7 +259,7 @@
 
     <p>
       Function calls must <strong>not</strong> have any whitespace
-      between the function name and the opening bracket. e.g.
+      between the function name and the opening bracket. E.g.
     </p>
     <pre>
       bar = foo (wizz);  // Bad
@@ -269,7 +269,7 @@
     <p>
       Function typedefs must <strong>not</strong> have any whitespace
       between the closing bracket of the function name and opening
-      bracket of the arg list. e.g.
+      bracket of the arg list. E.g.
     </p>
     <pre>
       typedef int (*foo) (int wizz);  // Bad
@@ -278,7 +278,7 @@
 
     <p>
       There must not be any whitespace immediately following any
-      opening bracket, or immediately prior to any closing bracket. e.g.
+      opening bracket, or immediately prior to any closing bracket. E.g.
     </p>
     <pre>
       int foo( int wizz );  // Bad