fixup: version

Author: Hans Larsen

dfx/src/config/mod.rs

@@ -2,6 +2,11 @@ pub mod cache;
 pub mod dfinity;
 
 static mut DFX_VERSION: Option<String> = None;
+/// Returns the version of DFX that was built.
+/// In debug, add a timestamp of the upstream compilation at the end of version to ensure all
+/// debug runs are unique (and cached uniquely).
+/// That timestamp is taken from the DFX_TIMESTAMP_DEBUG_MODE_ONLY env var that is set in
+/// Nix.
 pub fn dfx_version() -> &'static str {
     unsafe {
         match &DFX_VERSION {
@@ -11,8 +16,6 @@ pub fn dfx_version() -> &'static str {
 
                 #[cfg(debug_assertions)]
                 {
-                    // In debug, add a timestamp of the compilation at the end of version to ensure all
-                    // debug runs are unique (and cached uniquely).
                     DFX_VERSION = Some(format!(
                         "{}-{}",
                         version,