Improve intra-line diff highlighting

[Christian Boos]

Looking at this one: ​http://trac.edgewall.org/wiki/TracInstall?action=diff&version=231

TracInstall

@@ -43 +43 @@
 * [http://www.postgresql.org/ PostgreSQL] 
 * [http://initd.org/projects/psycopg2 psycopg2] or [http://pypgsql.sourceforge.net/ pyPgSQL] 
 
- '''Warning''': Postgresql-8.3 uses a strict type checking mechanism. To use trac with the 8.3 Version of Postgresql, you will need the latest version of trac. 
+ '''Warning''': PostgreSQL 8.3 uses a strict type checking mechanism. To use Trac with the 8.3 Version of PostgreSQL, you will need the latest version of Trac. 
 
 === For MySQL === 
 

I think we should be able to do much better, something like:

TracInstall

@@ -43 +43 @@
-* [http://www.postgresql.org/ PostgreSQL] 
-* [http://initd.org/projects/psycopg2 psycopg2] or [http://pypgsql.sourceforge.net/ pyPgSQL] 
- 
-sql-tsqlt
+SQL TSQLT
- 
-=== For MySQL === 
- 

That would be especially useful for Wiki text diffs, where it's common to have one line for a full paragraph, but the clarity of code diffs would probably benefit of this enhancement as well.

A somewhat related enhancement would be to have an heuristic for triggering the intra-line diff highlighting also when the base and new block length differ, as it's common to have common lines changed together with lines added/removed, in the same chunk.

[Christian Boos]

Milestone 1.0 deleted

[framay <franz.mayer@…>]

+1 on this ticket. That would be useful for our installation as well, since we change description and custom textarea fields in ticket quite often.

[Peter Suter]

I still got a patch for this somewhere. I'm not sure how much of a performance impact (if any) there is though. Maybe the old approach should be kept as an option somehow?

[Peter Suter]

Use difflib to markup intraline changes.