revlog: rename 'self.checkinlinesize' into '_enforceinlinesize'

The name change has two motivations:

1) The function has no external caller, so we move it to protected space.
2) the function does more than checking it also split the data if we have more
   data than 'inline' supports.

mercurial/changelog.py

@@ -432,7 +432,7 b' class changelog(revlog.revlog):'
             self._delaybuf = None
         self._divert = False
         # split when we're done
-        self.checkinlinesize(tr)
+        self._enforceinlinesize(tr)
 
     def _writepending(self, tr):
         "create a file containing the unfinalized state for pretxnchangegroup"
@@ -458,9 +458,9 b' class changelog(revlog.revlog):'
 
         return False
 
-    def checkinlinesize(self, tr, fp=None):
+    def _enforceinlinesize(self, tr, fp=None):
         if not self._delayed:
-            revlog.revlog.checkinlinesize(self, tr, fp)
+            revlog.revlog._enforceinlinesize(self, tr, fp)
 
     def read(self, node):
         """Obtain data from a parsed changelog revision.

mercurial/revlog.py

@@ -1834,7 +1834,7 b' class revlog(object):'
             raise RevlogError(_("integrity check failed on %s:%s")
                 % (self.indexfile, pycompat.bytestr(revornode)))
 
-    def checkinlinesize(self, tr, fp=None):
+    def _enforceinlinesize(self, tr, fp=None):
         """Check if the revlog is too big for inline and convert if so.
 
         This should be called after revisions are added to the revlog. If the
@@ -2145,7 +2145,7 b' class revlog(object):'
             ifh.write(entry)
             ifh.write(data[0])
             ifh.write(data[1])
-            self.checkinlinesize(transaction, ifh)
+            self._enforceinlinesize(transaction, ifh)
 
     def addgroup(self, deltas, linkmapper, transaction, addrevisioncb=None):
         """