fix(dotenv): apply review suggestions

plugins/dotenv/dotenv.plugin.zsh

@@ -55,7 +55,7 @@ _parse_dotenv_content() {
     fi
 
     [[ -z "$line" ]] || line+=" "
-    line="$node"
+    line+="$node"
   done
 
   local -a forbidden_vars=(

plugins/dotenv/tests/_support/bootstrap

@@ -23,7 +23,7 @@ _parse_dotenv_export() {
   done
 }
 
-# Helper: Run parse_dotenv supressing stderr
+# Helper: Run parse_dotenv suppressing stderr
 _parse_dotenv_quiet() {
   parse_dotenv "$@" 2>/dev/null
 }

plugins/dotenv/tests/basic-parsing.zunit

@@ -250,6 +250,16 @@ EOF
   assert "DOTENV_TEST_VARS" var_same_as "expected_vars"
 }
 
+@test 'parse ignores non-assignment commands with assignment-looking arguments' {
+  > "$fixture" <<'EOF'
+print SHOULD_NOT_PARSE=value
+EOF
+
+  _parse_dotenv_test "$fixture"
+
+  assert "DOTENV_TEST_VARS" var_same_as "expected_vars"
+}
+
 @test 'parse special characters' {
   > "$fixture" <<'EOF'
 # Special characters