Enhance the string formatter (used by printf()) so that the width and

precision of string substitution operators refer to characters instead of
bytes when the alternate-form-2 flag ("!") is used.  Also fix the %c
substition to always work within unicode, regardless of the
alternate-form-2 flag.

FossilOrigin-Name: c883c4d33f4cd722982aca17eeb355d19eeed793991d923b5494d173b1d0c73a

diff --cc manifest
index ea203fe2f39623d4ec592a2dfcad66c488bc1ed8,5fae45a4a298964542752dd4561787b8418548da..2e00962c430148cfcb79bf86c44a9dc62821b434
--- 1/manifest
--- 2/manifest
+++ b/manifest
@@@ -1,5 -1,5 +1,5 @@@
- C Only\stry\sto\suse\sthe\sgeteuid()\sinterface\son\sunix\sif\sHAVE_FCHOWN\sis\sdefined.\nThis\sfixes\sthe\sbuild\sfor\svxWorks,\swe\sare\stold.
- D 2018-02-19T16:34:31.891
 -C Printing\sa\svalue\sof\s0\susing\s%c\sterminates\sthe\sstring.
 -D 2018-02-19T21:58:16.694
++C Enhance\sthe\sstring\sformatter\s(used\sby\sprintf())\sso\sthat\sthe\swidth\sand\nprecision\sof\sstring\ssubstitution\soperators\srefer\sto\scharacters\sinstead\sof\nbytes\swhen\sthe\salternate-form-2\sflag\s("!")\sis\sused.\s\sAlso\sfix\sthe\s%c\nsubstition\sto\salways\swork\swithin\sunicode,\sregardless\sof\sthe\s\nalternate-form-2\sflag.
++D 2018-02-19T22:46:19.020
  F .fossil-settings/empty-dirs dbb81e8fc0401ac46a1491ab34a7f2c7c0452f2f06b54ebb845d024ca8283ef1
  F .fossil-settings/ignore-glob 35175cdfcf539b2318cb04a9901442804be81cd677d8b889fcc9149c21f239ea
  F Makefile.in 7a3f714b4fcf793108042b7b0a5c720b0b310ec84314d61ba7f3f49f27e550ea
@@@ -1707,7 -1707,7 +1707,8 @@@ F vsixtest/vsixtest.tcl 6a9a6ab600c25a9
  F vsixtest/vsixtest.vcxproj.data 2ed517e100c66dc455b492e1a33350c1b20fbcdc
  F vsixtest/vsixtest.vcxproj.filters 37e51ffedcdb064aad6ff33b6148725226cd608e
  F vsixtest/vsixtest_TemporaryKey.pfx e5b1b036facdb453873e7084e1cae9102ccc67a0
- P 88258770adead70fa101c74e266a37bb9aaffac0ba738a4b345617feb8c46477
- R 2e4bdb0c045376ff7154d29ff239bf61
 -P ac188211119bfd77f43e4aba8acab733a56aac90b4c8a11f7ef8e6388582438f
++P 38f654dc117bb11d61407327884b5c913cfaf920547bebc4ce5a4cf983e5c20e 255612f0a131f2f522cbca3cc5a1edcf7e38938abca25ba421e7e38a422db9c9
+ R 508c3db0e2913d65a43c01bb9b80f5ab
++T +closed 255612f0a131f2f522cbca3cc5a1edcf7e38938abca25ba421e7e38a422db9c9
  U drh
- Z 37b9f8fa92af1d03e78cb9f20faaf7e7
 -Z 626afeea462f05f2075e81e36cf30b70
++Z 1886f73e61ed30038df9856ac6df181f

diff --cc manifest.uuid
index f3e38fcfacb17141eb19f58ffb6b65626190a585,3b60577eae68b6bccb0d074c7a0b44817b86e576..25a24484fce20516e7528fda801377064f2970c9
--- 1/manifest.uuid
--- 2/manifest.uuid
+++ b/manifest.uuid
@@@ -1,1 -1,1 +1,1 @@@
- 38f654dc117bb11d61407327884b5c913cfaf920547bebc4ce5a4cf983e5c20e
 -255612f0a131f2f522cbca3cc5a1edcf7e38938abca25ba421e7e38a422db9c9
++c883c4d33f4cd722982aca17eeb355d19eeed793991d923b5494d173b1d0c73a