[BUG] No newline written to the end of btop.conf

[rpdelaney]

Describe the bug

There is no newline at the end of btop.conf. This can cause conflicts, for instance when dotfiles are under source control and git expects them.

To Reproduce

Run btop, change any configuration option, and quit:

$ git diff .
diff --git i/home/.config/btop/btop.conf w/home/.config/btop/btop.conf
index def875a..b3db07b 100644
--- i/home/.config/btop/btop.conf
+++ w/home/.config/btop/btop.conf
@@ -25,7 +25,7 @@ presets = "cpu:1:default,proc:0:default cpu:0:default,mem:0:default,net:0:defaul
 vim_keys = True

 #* Rounded corners on boxes, is ignored if TTY mode is ON.
-rounded_corners = True
+rounded_corners = False

 #* Default symbols to use for graph creation, "braille", "block" or "tty".
 #* "braille" offers the highest resolution but might not be included in all fonts.
@@ -200,4 +200,4 @@ selected_battery = "Auto"

 #* Set loglevel for "~/.config/btop/btop.log" levels are: "ERROR" "WARNING" "INFO" "DEBUG".
 #* The level set includes all lower levels, i.e. "DEBUG" will show all logging info.
-log_level = "WARNING"
+log_level = "WARNING"
\ No newline at end of file

Expected behavior

The configuration should be changed without removing the trailing newline:

diff --git i/home/.config/btop/btop.conf w/home/.config/btop/btop.conf
index def875a..8fde49c 100644
--- i/home/.config/btop/btop.conf
+++ w/home/.config/btop/btop.conf
@@ -25,7 +25,7 @@ presets = "cpu:1:default,proc:0:default cpu:0:default,mem:0:default,net:0:defaul
 vim_keys = True

 #* Rounded corners on boxes, is ignored if TTY mode is ON.
-rounded_corners = True
+rounded_corners = False

 #* Default symbols to use for graph creation, "braille", "block" or "tty".
 #* "braille" offers the highest resolution but might not be included in all fonts.

Info (please complete the following information):

• btop++ version: btop -v

btop version: 1.2.7

• Binary:

homebrew

• (If compiled) Compiler and version:

N/A

• Architecture: [x86_64, aarch64, etc.] uname -m

arm64

• Platform: [Linux, FreeBSD, OsX]

macOS-12.4-arm64-arm-64bit

• (Linux) Kernel: uname -r
• (OSX/FreeBSD) Os release version:
• Terminal used:

kitty

• Font used:

Iosevka

Additional context
N/A