diff --git a/gen-key-constants.py b/gen-key-constants.py
index 2ab1ef526..2c8a5a739 100755
--- a/gen-key-constants.py
+++ b/gen-key-constants.py
@@ -333,8 +333,8 @@ def generate_functional_table() -> None:
     text = f'var functional_key_number_to_name_map = map[int]string{serialize_go_dict(code_to_name)}\n'
     text += f'\nvar csi_number_to_functional_number_map = map[int]int{serialize_go_dict(csi_map)}\n'
     text += f'\nvar letter_trailer_to_csi_number_map = map[string]int{serialize_go_dict(letter_trailer_codes)}\n'
-    tt = ', '.join(f'{x}:true' for x in tilde_trailers)
-    text += f'\nvar tilde_trailers = map[int]bool{{ {tt} }}'
+    tt = ', '.join(f'{x}: true' for x in tilde_trailers)
+    text += '\nvar tilde_trailers = map[int]bool{' + f'{tt}' + '}\n'
     patch_file('tools/tui/loop/key-encoding.go', 'csi mapping', text, start_marker='// ', end_marker='')
 
 
diff --git a/tools/tui/loop/key-encoding.go b/tools/tui/loop/key-encoding.go
index 02a7b2045..7169e13cb 100644
--- a/tools/tui/loop/key-encoding.go
+++ b/tools/tui/loop/key-encoding.go
@@ -18,7 +18,8 @@ var csi_number_to_functional_number_map = map[int]int{2: 57348, 3: 57349, 5: 573
 
 var letter_trailer_to_csi_number_map = map[string]int{"A": 57352, "B": 57353, "C": 57351, "D": 57350, "E": 57427, "F": 8, "H": 7, "P": 11, "Q": 12, "S": 14}
 
-var tilde_trailers = map[int]bool{ 57348:true, 57349:true, 57354:true, 57355:true, 57366:true, 57368:true, 57369:true, 57370:true, 57371:true, 57372:true, 57373:true, 57374:true, 57375:true }
+var tilde_trailers = map[int]bool{57348: true, 57349: true, 57354: true, 57355: true, 57366: true, 57368: true, 57369: true, 57370: true, 57371: true, 57372: true, 57373: true, 57374: true, 57375: true}
+
 // end csi mapping
 // }}}