substrings should not convert to links

[obilodeau]

I imported my notes from http://conboy.garage.maemo.org/ and noticed that short note names are being used to create links within words in other notes. I think the correct behavior is to only convert full strings to links, or at least only when it begins a string. Depending on how the parsing is done, that could also have minor performance advantages as well.

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Imported from Launchpad using lp2gh.

• date created: 2013-10-02T16:16:25Z
• owner: davidfalkayn
• assignee: vbkaisetsu
• the launchpad url was https://bugs.launchpad.net/bugs/1234279