tmux: Fix C-e & C-y bindings

Apparently I broke them in commit 4e8ab80c66 ("tmux: Fix edge cases
in paragraph text-object") by adding the comments. Through them the
bindings were not set in place since the binding stopped with the
comment (I guess?). Weirdly I do not get an error message and the
default bindings stay, so I am not sure what exactly happens. This could
also be due to a version change from 3.3a to 3.4.

Fix the bindings by starting a code block instead of just escaping the
newline.

Do this also everywhere else to prevent errors in the future.

.config/tmux/tmux.conf

@@ -63,7 +63,7 @@ bind -n TripleClick1Pane {
 # when the current pane is in alternate mode and discard the `-e` flag passed to
 # copy-mode from the default binding (See below)
 # TODO: Do not modify selection when scolling with the wheel
-bind -n WheelUpPane \
+bind -n WheelUpPane {
 	if -F "#{||:#{pane_in_mode},#{mouse_any_flag}}" {
 		send -M
 	} {
@@ -73,16 +73,18 @@ bind -n WheelUpPane \
 			copy-mode; send -XN5 scroll-up
 		}
 	}
+}
 # Scroll without selecting the pane
 bind -T copy-mode-vi WheelUpPane send -XN5 scroll-up
 # Exit copy-mode when at the bottom. This practically mimics `copy-mode -e` but
 # only scrolling with the wheel (`-e` annoys me when scrolling down with `C-d`).
-bind -T copy-mode-vi WheelDownPane \
+bind -T copy-mode-vi WheelDownPane {
 	if -F "#{==:0,#{scroll_position}}" {
 		send -X cancel
 	} {
 		send -XN5 scroll-down
 	}
+}
 
 # Split panes with > and <
 unbind %
@@ -132,12 +134,13 @@ bind -r P swap-window -d -t :-1
 bind -n MouseDrag1Status swap-window -d -t=
 
 # TODO: do nothing on drags that don't start on a window name
-bind -n MouseDragEnd1StatusDefault \
+bind -n MouseDragEnd1StatusDefault {
 	if -F "#{e|>|f|0:#{mouse_x},#{e|/|f:#{window_width},2}}" {
 		run-shell "tmux move-window -at #{last_window_index}"
 	} {
 		move-window -t0
 	}
+}
 
 # Repeatable window-movement bindings
 bind -r \{ swap-pane -U
@@ -173,20 +176,22 @@ bind -T copy-mode-vi C-v {
 
 # Yank into system clipboard with vim-like bindings
 bind -T copy-mode-vi y run-shell '${XDG_CONFIG_HOME:-$HOME/.config}/tmux/yank.sh'
-bind -T copy-mode-vi Y \
+bind -T copy-mode-vi Y {
 	if -F "#{selection_present}" {
 		send -X copy-pipe-line
 	} {
 		send -X copy-pipe-end-of-line
 	}
+}
 
 # Clear selection or cancel copy-mode when nothing is selected
-bind -T copy-mode-vi Escape \
+bind -T copy-mode-vi Escape {
 	if -F "#{selection_present}" {
 		send -X clear-selection
 	} {
 		send -X cancel
 	}
+}
 
 # Use insert-mode-like bindings to cancel copy-mode
 bind -T copy-mode-vi A send -X cancel
@@ -200,7 +205,7 @@ bind -T copy-mode-vi i run-shell '${XDG_CONFIG_HOME:-$HOME/.config}/tmux/textobj
 # cannot scroll past the first and last history line, both bindings stop
 # scrolling when the respective line is visible. This mimics the behaviour of
 # vim's C-y at the top of the file.
-bind -T copy-mode-vi C-e \
+bind -T copy-mode-vi C-e {
 	# check that there is still history beneath to scroll to.
 	if -F "#{e|>:#{scroll_position},0}" {
 		send-keys -X scroll-down
@@ -209,8 +214,9 @@ bind -T copy-mode-vi C-e \
 			send-keys -X cursor-up
 		}
 	}
+}
 
-bind -T copy-mode-vi C-y \
+bind -T copy-mode-vi C-y {
 	# check that there is still history above to scroll to.
 	if -F "#{e|<:#{scroll_position},#{history_size}}" {
 		send-keys -X scroll-up
@@ -219,6 +225,7 @@ bind -T copy-mode-vi C-y \
 			send-keys -X cursor-down
 		}
 	}
+}
 
 # Navigate panes with <prefix>-[hjkl]
 # NOTE: C-[hjkl] (w/o prefix) moves through vim splits and tmux panes