tests: make histedit pass on Windows MSYS

The command file will now be named with $TESTTMP (with '\') instead of `pwd`
(with '/') to avoid wrong path conversions.

tests/test-histedit-bookmark-motion.t

@@ -95,8 +95,8 b''
   histedit:     moving bookmarks will-move-backwards
   histedit:  e860deea161a to ae467701c500
   histedit:     moving bookmarks four
-  saved backup bundle to $TESTTMP/r/.hg/strip-backup/d2ae7f538514-backup.hg
-  saved backup bundle to $TESTTMP/r/.hg/strip-backup/34a9919932c1-backup.hg
+  saved backup bundle to $TESTTMP/r/.hg/strip-backup/d2ae7f538514-backup.hg (glob)
+  saved backup bundle to $TESTTMP/r/.hg/strip-backup/34a9919932c1-backup.hg (glob)
   $ hg log --graph
   @  changeset:   3:0efacef7cb48
   |  bookmark:    five
@@ -152,7 +152,7 b''
   histedit:  0efacef7cb48 to 7c044e3e33a9
   histedit:  ae467701c500 to 1be9c35b4cb2
   histedit:     moving bookmarks four, three
-  saved backup bundle to $TESTTMP/r/.hg/strip-backup/ae467701c500-backup.hg
+  saved backup bundle to $TESTTMP/r/.hg/strip-backup/ae467701c500-backup.hg (glob)
 
 We expect 'five' to stay at tip, since the tipmost bookmark is most
 likely the useful signal.

tests/test-histedit-commute.t

@@ -6,7 +6,7 b''
   > histedit=
   > EOF
 
-  $ EDITED=`pwd`/editedhistory
+  $ EDITED="$TESTTMP/editedhistory"
   $ cat > $EDITED <<EOF
   > pick 177f92b77385 c
   > pick e860deea161a e

tests/test-histedit-drop.t

@@ -6,7 +6,7 b''
   > histedit=
   > EOF
 
-  $ EDITED=`pwd`/editedhistory
+  $ EDITED="$TESTTMP/editedhistory"
   $ cat > $EDITED <<EOF
   > drop 177f92b77385 c
   > pick e860deea161a e

tests/test-histedit-edit.t

@@ -6,7 +6,7 b''
   > histedit=
   > EOF
 
-  $ EDITED=`pwd`/editedhistory
+  $ EDITED="$TESTTMP/editedhistory"
   $ cat > $EDITED <<EOF
   > pick 177f92b77385 c
   > pick 055a42cdd887 d
@@ -70,7 +70,7 b' commit, then edit the revision'
   $ hg ci -m 'wat'
   created new head
   $ echo a > e
-  $ HGEDITOR='echo "foobaz" > ' hg histedit --continue 2>&1 | fixbundle
+  $ HGEDITOR='echo foobaz > ' hg histedit --continue 2>&1 | fixbundle
   0 files updated, 0 files merged, 0 files removed, 0 files unresolved
   0 files updated, 0 files merged, 0 files removed, 0 files unresolved
 

tests/test-histedit-fold-non-commute.t

@@ -6,7 +6,7 b''
   > histedit=
   > EOF
 
-  $ EDITED=`pwd`/editedhistory
+  $ EDITED="$TESTTMP/editedhistory"
   $ cat > $EDITED <<EOF
   > pick 177f92b77385 c
   > pick 055a42cdd887 d

tests/test-histedit-fold.t

@@ -6,7 +6,7 b''
   > histedit=
   > EOF
 
-  $ EDITED=`pwd`/editedhistory
+  $ EDITED="$TESTTMP/editedhistory"
   $ cat > $EDITED <<EOF
   > pick e860deea161a e
   > pick 652413bf663e f

tests/test-histedit-non-commute-abort.t

@@ -6,7 +6,7 b''
   > histedit=
   > EOF
 
-  $ EDITED=`pwd`/editedhistory
+  $ EDITED="$TESTTMP/editedhistory"
   $ cat > $EDITED <<EOF
   > pick 177f92b77385 c
   > pick 055a42cdd887 d

tests/test-histedit-non-commute.t

@@ -6,7 +6,7 b''
   > histedit=
   > EOF
 
-  $ EDITED=`pwd`/editedhistory
+  $ EDITED="$TESTTMP/editedhistory"
   $ cat > $EDITED <<EOF
   > pick 177f92b77385 c
   > pick 055a42cdd887 d

tests/test-histedit-outgoing.t

@@ -4,7 +4,7 b''
   > histedit=
   > EOF
 
-  $ EDITED=`pwd`/editedhistory
+  $ EDITED="$TESTTMP/editedhistory"
   $ cat > $EDITED <<EOF
   > pick 177f92b77385 c
   > pick e860deea161a e