rust: Rename the `Revlog::get_node_rev` method to `rev_from_node`

This better describes the input and outputs of this method.

Also rewrite the doc-comment, which seemed to have been left from copy-paste
of another method.

Differential Revision: https://phab.mercurial-scm.org/D11415

rust/hg-core/src/revlog/changelog.rs

@@ -22,7 +22,7 b' impl Changelog {'
         &self,
         node: NodePrefix,
     ) -> Result<ChangelogEntry, RevlogError> {
-        let rev = self.revlog.get_node_rev(node)?;
+        let rev = self.revlog.rev_from_node(node)?;
         self.get_rev(rev)
     }
 

rust/hg-core/src/revlog/filelog.rs

@@ -30,7 +30,7 b' impl Filelog {'
         &self,
         file_node: impl Into<NodePrefix>,
     ) -> Result<FilelogEntry, RevlogError> {
-        let file_rev = self.revlog.get_node_rev(file_node.into())?;
+        let file_rev = self.revlog.rev_from_node(file_node.into())?;
         self.get_rev(file_rev)
     }
 

rust/hg-core/src/revlog/manifest.rs

@@ -20,7 +20,7 b' impl Manifestlog {'
 
     /// Return the `ManifestEntry` of a given node id.
     pub fn get_node(&self, node: NodePrefix) -> Result<Manifest, RevlogError> {
-        let rev = self.revlog.get_node_rev(node)?;
+        let rev = self.revlog.rev_from_node(node)?;
         self.get_rev(rev)
     }
 

rust/hg-core/src/revlog/revlog.rs

@@ -124,9 +124,9 b' impl Revlog {'
         Some(self.index.get_entry(rev)?.hash())
     }
 
-    /// Return the full data associated to a node.
+    /// Return the revision number for the given node ID, if it exists in this revlog
     #[timed]
-    pub fn get_node_rev(
+    pub fn rev_from_node(
         &self,
         node: NodePrefix,
     ) -> Result<Revision, RevlogError> {

rust/hg-core/src/revset.rs

@@ -61,7 +61,7 b' pub fn resolve_rev_number_or_hex_prefix('
         {
             return Err(RevlogError::WDirUnsupported);
         }
-        return revlog.get_node_rev(prefix);
+        return revlog.rev_from_node(prefix);
     }
     Err(RevlogError::InvalidRevision)
 }