[a] (0) Don't require a space between the word system and the system …

…identifier.

Fixing http://www.w3.org/Bugs/Public/show_bug.cgi?id=7615

git-svn-id: http://svn.whatwg.org/webapps@3923 340c8d12-0b0e-0410-8428-c7bf67bfef74

index

  <ol class=brief><li>One or more <a href=#space-character title="space character">space characters</a>.</li>
   <li>A string that is an <a href=#ascii-case-insensitive>ASCII case-insensitive</a> match for the string "<code title="">SYSTEM</code>".</li>
   <li>One or more <a href=#space-character title="space character">space characters</a>.</li>
   <li>Zero or more <a href=#space-character title="space character">space characters</a>.</li>
   <li>A U+0022 QUOTATION MARK or U+0027 APOSTROPHE character (the <i>quote mark</i>).</li>
   <li>The literal string "<code title="">about:legacy-compat</code>".</li>
   <li>A matching U+0022 QUOTATION MARK or U+0027 APOSTROPHE character (i.e. the same character as in the earlier step marked <i>quote mark</i>).</li>

source

  <ol class="brief">
   <li>One or more <span title="space character">space characters</span>.</li>
   <li>A string that is an <span>ASCII case-insensitive</span> match for the string "<code title="">SYSTEM</code>".</li>
   <li>One or more <span title="space character">space characters</span>.</li>
   <li>Zero or more <span title="space character">space characters</span>.</li>
   <li>A U+0022 QUOTATION MARK or U+0027 APOSTROPHE character (the <i>quote mark</i>).</li>
   <li>The literal string "<code title="">about:legacy-compat</code>".</li>
   <li>A matching U+0022 QUOTATION MARK or U+0027 APOSTROPHE character (i.e. the same character as in the earlier step marked <i>quote mark</i>).</li>