uniqueidentifier converted to 255 char string

[gmcve]

uniqueidentifier are converted to a 255 char string so the first 36 chars are
followed by 219 blank spaces.

I moved the RTRIM

DECLARE @Column_Name UNIQUEIDENTIFIER = 'EDAB8EA9-76D1-45EE-BC09-93CBDB63A54A'
SELECT COALESCE('''' + REPLACE(CONVERT(char(255),RTRIM(@Column_Name)),'''','''''')+'''','NULL')
SELECT COALESCE('''' + REPLACE(RTRIM(CONVERT(char(255),@Column_Name)),'''','''''')+'''','NULL')

[zippy1981]

Why not convert to CHAR(36)?