fix broken export command example

$ export PATH = /usr/local/bin:$PATH
-bash: export: `=': not a valid identifier
-bash: export: `/usr/bin: ....': not a valid identifier

$ export PATH=/usr/local/bin:$PATH
[no error]

index.html

@@ -680,7 +680,7 @@ USE_OSGPLUGIN(<plugin2>)
     <p>
     For Bourne shells, edit .profile
     </p>
-    <pre>export PATH = /usr/local/bin:$PATH</pre>
+    <pre>export PATH=/usr/local/bin:$PATH</pre>
     <p>
     On 64-bit FreeBSD,
     there are <a href="#issue-non-multilib">issues without a 32-bit compiler</a>.