Fixed typo in template help, #1143

osxphotos/phototemplate.md

@@ -149,9 +149,9 @@ e.g. `"{created.year}/{openbrace}{title}{closebrace}"` would result in `"2020/{P
 
 **Variables**
 
-You can define variables for later use in the template string using the format `{var:NAME,VALUE}`.  Variables may then be referenced using the format `%NAME`. For example: `{var:foo,bar}` defines the variable `%foo` to have value `bar`. This can be useful if you want to re-use a complex template value in multiple places within your template string or for allowing the use of characters that would otherwise be prohibited in a template string. For example, the "pipe" (`|`) character is not allowed in a find/replace pair but you can get around this limitation like so: `{var:pipe,{pipe}}{title[-,%pipe]}` which replaces the `-` character with `|` (the value of `%pipe`).  
+You can define variables for later use in the template string using the format `{var:NAME,VALUE}` where `VALUE` may be a raw string or another template field enclosed in `{}`. Variables may then be referenced using the format `%NAME`. For example: `{var:foo,bar}` defines the variable `%foo` to have value `bar`. This can be useful if you want to re-use a complex template value in multiple places within your template string or for allowing the use of characters that would otherwise be prohibited in a template string. For example, the "pipe" (`|`) character is not allowed in a find/replace pair but you can get around this limitation like so: `{var:pipe,{pipe}}{title[-,%pipe]}` which replaces the `-` character with `|` (the value of `%pipe`).  
 
-Variables can also be referenced as fields in the template string, for example: `{var:year,created.year}{original_name}-{%year}`. In some cases, use of variables can make your template string more readable.  Variables can be used as template fields, as values for filters, as values for conditional operations, or as default values.  When used as a conditional value or default value, variables should be treated like any other field and enclosed in braces as conditional and default values are evaluated as template strings. For example: `{var:name,Katie}{person contains {%name}?{%name},Not-{%name}}`.
+Variables can also be referenced as fields in the template string, for example: `{var:year,{created.year}}{original_name}-{%year}`. In some cases, use of variables can make your template string more readable.  Variables can be used as template fields, as values for filters, as values for conditional operations, or as default values.  When used as a conditional value or default value, variables should be treated like any other field and enclosed in braces as conditional and default values are evaluated as template strings. For example: `{var:name,Katie}{person contains {%name}?{%name},Not-{%name}}`.
 
 If you need to use a `%` (percent sign character), you can escape the percent sign by using `%%`.  You can also use the `{percent}` template field where a template field is required. For example: