Version control for research and teaching statements Every time I apply for a job I write a new cover letter, research statement, and teaching statement. While each statement is personalized for the specific job, I tend to do a lot of cutting and pasting and little new writing (yes I have a whole collection of past statements). This seems like something that might be useful to keep under version control. how do people manage the different versions of the cover letter, research statement, and teaching statement?
My research and teaching statement have a lot of commented text (I write in LaTeX). This is because I amend each document specifically for each job application - as you do. 

The detail in which I describe each topic changes depending on what job I am applying for.  I comment out text which is too detailed for the job to which I am applying. However, for other job applications, I might like to have that text put back into my statement, or write new text, to be perhaps commented out in a future application for a different job.

I now have documents with a lot of phrases from which I can "pick and choose", depending on the specific job to which I am applying, and amend appropriately. It isn't really version control, I know, but I find it useful to have a selection of wordings to choose from in one place so that I can compare and contrast things like the level of detail and the tone. This isn't particularly onerous as these documents do not total more than 2 - 3 pages in my case.