Update borg diff help message regarding --same-chunker-params

borg/archiver.py

@@ -1213,9 +1213,12 @@ class Archiver:
             be specified for ARCHIVE1.
 
             For archives created with Borg 1.1 or newer only chunks IDs
-            are compared, which is very fast. For archives prior to Borg 1.1 chunk contents must be
-            compared, unless you are sure they were created with the same chunker params
-            (pass --same-chunker-params). Note that the chunker params changed from Borg 0.xx to 1.0.
+            are compared, which is very fast.
+
+            For archives prior to Borg 1.1 chunk contents are compared by default.
+            If you did not create the archives with different chunker params,
+            pass --same-chunker-params.
+            Note that the chunker params changed from Borg 0.xx to 1.0.
 
             See the output of the "borg help patterns" command for more help on exclude patterns.
             """)

docs/usage/diff.rst.inc

@@ -49,8 +49,11 @@ Both archives need to be in the same repository, and a repository location may o
 be specified for ARCHIVE1.
 
 For archives created with Borg 1.1 or newer only chunks IDs
-are compared, which is very fast. For archives prior to Borg 1.1 chunk contents must be
-compared, unless you are sure they were created with the same chunker params
-(pass --same-chunker-params). Note that the chunker params changed from Borg 0.xx to 1.0.
+are compared, which is very fast.
+
+For archives prior to Borg 1.1 chunk contents are compared by default.
+If you did not create the archives with different chunker params,
+pass --same-chunker-params.
+Note that the chunker params changed from Borg 0.xx to 1.0.
 
 See the output of the "borg help patterns" command for more help on exclude patterns.