Fix foreach in TikZ to remember more stuff between iterations #1316
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Merge from upstream
This commit adds more information to what TikZ remembers between foreach iterations, and does so in a way that makes it easier to add other macros and dimensions to the list of things it remembers, both at the code level and via keys. Fixes pgf-tikz#356, pgf-tikz#1047, pgf-tikz#1303, pgf-tikz#1313 Signed-off-by: Andrew Stacey <loopspace@mathforge.org>
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Motivation for this change
Fixes #356, #1047, #1303, #1313 by remembering more information between iterations of a foreach loop on a path, in particular the last node. Also provides a more flexible interface to remember more macros & dimensions at both the code level and the user level (the latter via pgfkeys).
See #1304 for a previous version of this pull request where something went wrong with signing the commits.
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