Rename variable

Author: tesuji

src/cli/rustup_mode.rs

@@ -1028,12 +1028,12 @@ fn man(cfg: &Cfg, m: &ArgMatches<'_>) -> Result<()> {
     let command = m.value_of("command").unwrap();
 
     let toolchain = explicit_or_dir_toolchain(cfg, m)?;
-    let mut toolchain_manpath = toolchain.path().to_path_buf();
-    toolchain_manpath.push("share");
-    toolchain_manpath.push("man");
-    utils::assert_is_directory(&toolchain_manpath)?;
+    let mut toolchain = toolchain.path().to_path_buf();
+    toolchain.push("share");
+    toolchain.push("man");
+    utils::assert_is_directory(&toolchain)?;
 
-    let mut manpaths = std::ffi::OsString::from(toolchain_manpath);
+    let mut manpaths = std::ffi::OsString::from(toolchain);
     manpaths.push(":"); // ends with a colon to prepend it to the default MANPATH list
     if let Some(path) = std::env::var_os("MANPATH") {
         manpaths.push(path);