Add note to ignore_status about existing asserts

Namely, it removes any assertions that were previously made.

Author: Daan Sprenkels

src/assert.rs

@@ -240,6 +240,9 @@ impl Assert {
 
     /// Do not care whether the command exits successfully or if it fails.
     ///
+    /// This function removes any assertions that were already set, including
+    /// any expected exit code that was set with [`fails_with`].
+    ///
     /// # Examples
     ///
     /// ```rust
@@ -251,6 +254,8 @@ impl Assert {
     ///     .stderr().is("cat: non-existing-file: No such file or directory")
     ///     .unwrap();
     /// ```
+    ///
+    /// [`fails_with`]: #method.fails_with
     pub fn ignore_status(mut self) -> Self {
         self.expect_exit_code = None;
         self.expect_success = None;