Skip PCRE tests on Windows

These constantly fail for silly reasons like line endings or
not having the French locale installed.

May as well just save a manual step and needing to refer people
to an easily-missed item in README.windows.md.
limit xtra buffer allocation
Backtraces: mark lineinfo with information about whether it was C code
Start developer documentation
Introduce UnitRange argument to eigenfunctions.
Expand documentation of "do" blocks
align complex number printing (ref #29)
aligning with the sign separating the real and im parts for now
Merge pull request #6680 from tanmaykm/tanmaykm

align complex number printing (ref #29)
Fix bounds error in forward-i-search
Bind remaining control characters in the search keymap

New functionality:
  ^L clears the display
  ^N and ^P iterate through the next or previous result
  ^G and ESC-ESC cancel search mode
  ^W erases the previous word to whitespace
refer to diagm in doc for diag. closes #6676
Merge pull request #6678 from JuliaLang/anj/subeig

Introduce UnitRange argument to eigenfunctions.
make type inference consider directly spliced-in functions. closes #6626
Merge pull request #6667 from amitmurthy/amitm/alloc

limit xtra buffer allocation
Further attempt to clarify "do" syntax.
Merge branch 'master' of github.com:JuliaLang/julia
fix #6645, 8-byte alignment of Float64 on 32-bit
Make pasting into the REPL much simpler

Previously, the REPL would try to determine if you had pasted a complete expression, and, if that expression was followed by a newline, it would evaluate it.  If there were multiple expressions, it would evaluate each one by one. However, this often fails for me when pasting incomplete snippets that I intend to edit in the command line, and since we have such good multi-line editing support I don't even think it's necessary.

This patch simply removes those smarts.  All pasted text is entered into the buffer verbatim (except for an unindentation pass if the cursor is at the beginning of the buffer). The pasted text is not sent for evaluation, even if followed by trailing newlines.  Additionally, this fixes #6664 as the cursor ends up at the end of the pasted snippet.
For @simd, clarify what user is asserting versus what is nessary.
Merge pull request #6683 from mbauman/dumb-paste

RFC: Make pasting into the REPL much simpler