The commit that remove duplicate snippets broke important latex feature.

[gzqx]

#1505 broke the feature introduced in #1474. Without the regrex substitution, it will put space inside label, which is a syntax error in latex.

According to the document of SnipMate it should support regrex from |substitution|, however I cannot get any snippet including the examples in the document to work following snipmate syntax (I have tried ultisnip, snipmate or even luasnip with the syntax of snipmate). I am not sure if there is some special setting in vim-snippet which caused this or there is simply some bug in SnipMate.

For now I would recommend bring back the snippets removed in #1505.

[gzqx]

For some reason I don't know, I now managed to get it working with snipmate syntax. I have created a pull request #1515

[gzqx]

However, notice that this syntax is not compatible with Ultisnip, which means that things will go wrong if one use ultisnip instead of snipmate. I still suggest bringing back #1474 in combination with this PR.