util: avoid using hashlib on Python < 2.5 (issue2278)
The following patch allows the use of python2.4 with a standalone
hashlib rather than assuming that python2.5 is in use when hashlib is
imported successfully.
# ==== setup repository ====
% hg init
adding .hgeol
adding a.txt
% hg clone repo repo-LF
2 files updated, 0 files merged, 0 files removed, 0 files unresolved
% printrepr.py a.txt (before)
first\r
second\r
third\r
% printrepr.py a.txt (after)
first
third
% hg diff
diff --git a/a.txt b/a.txt
--- a/a.txt
+++ b/a.txt
@@ -1,3 +1,2 @@
first\r
-second\r
third\r
% hg update 0
merging a.txt
1 files updated, 1 files merged, 0 files removed, 0 files unresolved
% printrepr.py a.txt
first\r
third\r
% hg diff
diff --git a/a.txt b/a.txt
--- a/a.txt
+++ b/a.txt
@@ -1,3 +1,2 @@
first
-second
third
% hg clone repo repo-CRLF
2 files updated, 0 files merged, 0 files removed, 0 files unresolved
% printrepr.py a.txt (before)
first\r
second\r
third\r
% printrepr.py a.txt (after)
first\r
third\r
% hg diff
diff --git a/a.txt b/a.txt
--- a/a.txt
+++ b/a.txt
@@ -1,3 +1,2 @@
first\r
-second\r
third\r
% hg update 0
merging a.txt
1 files updated, 1 files merged, 0 files removed, 0 files unresolved
% printrepr.py a.txt
first\r
third\r
% hg diff
diff --git a/a.txt b/a.txt
--- a/a.txt
+++ b/a.txt
@@ -1,3 +1,2 @@
first
-second
third