[PATCH] rebase: update comment about FreeBSD /bin/sh

[Ed Maste <emaste@freebsd.org>]

Commit 9f50d32 introduced a fix for FreeBSD /bin/sh misbehaviour
when dot-sourcing a file containing "return" statements outside of
any function, from a function in another shell script. That issue
affects FreeBSD 9.x, and is not present in the /bin/sh in FreeBSD
10.3 and later. Update the comment to clarify this.

The example from 9f50d32's commit message produces the expected output
on FreeBSD 10.3 and -CURRENT (the upcoming 11.0):

% sh script1.sh
only this line should show
%

Signed-off-by: Ed Maste <emaste@freebsd.org>
---
 git-rebase--am.sh          | 4 ++--
 git-rebase--interactive.sh | 4 ++--
 git-rebase--merge.sh       | 4 ++--
 3 files changed, 6 insertions(+), 6 deletions(-)

diff --git a/git-rebase--am.sh b/git-rebase--am.sh
index 9ae898b..3752393 100644
--- a/git-rebase--am.sh
+++ b/git-rebase--am.sh
@@ -9,8 +9,8 @@
 # below were not inside any function, and expected to return
 # to the function that dot-sourced us.
 #
-# However, FreeBSD /bin/sh misbehaves on such a construct and
-# continues to run the statements that follow such a "return".
+# However, older (9.x) versions of FreeBSD /bin/sh misbehave on such a
+# construct and continue to run the statements that follow such a "return".
 # As a work-around, we introduce an extra layer of a function
 # here, and immediately call it after defining it.
 git_rebase__am () {
diff --git a/git-rebase--interactive.sh b/git-rebase--interactive.sh
index 6e96abc..05f22e4 100644
--- a/git-rebase--interactive.sh
+++ b/git-rebase--interactive.sh
@@ -1038,8 +1038,8 @@ check_todo_list () {
 # below were not inside any function, and expected to return
 # to the function that dot-sourced us.
 #
-# However, FreeBSD /bin/sh misbehaves on such a construct and
-# continues to run the statements that follow such a "return".
+# However, older (9.x) versions of FreeBSD /bin/sh misbehave on such a
+# construct and continue to run the statements that follow such a "return".
 # As a work-around, we introduce an extra layer of a function
 # here, and immediately call it after defining it.
 git_rebase__interactive () {
diff --git a/git-rebase--merge.sh b/git-rebase--merge.sh
index 8d43db9..06a4723 100644
--- a/git-rebase--merge.sh
+++ b/git-rebase--merge.sh
@@ -107,8 +107,8 @@ finish_rb_merge () {
 # below were not inside any function, and expected to return
 # to the function that dot-sourced us.
 #
-# However, FreeBSD /bin/sh misbehaves on such a construct and
-# continues to run the statements that follow such a "return".
+# However, older (9.x) versions of FreeBSD /bin/sh misbehave on such a
+# construct and continue to run the statements that follow such a "return".
 # As a work-around, we introduce an extra layer of a function
 # here, and immediately call it after defining it.
 git_rebase__merge () {
-- 
2.8.1