Not able to add a blank space in the email attachment

Question

I am trying to attach an ics file and I'm just not able to add a blank space between certain characters. I tried using   and <br/> to even break the line but instead it's printing as it is.

Here's my code

<messaging:attachment filename="invite.ics">
BEGIN:VCALENDAR
VERSION:2.0
PRODID::-//hacksw/handcal//NONSGML v1.0//EN
BEGIN:VEVENT
DTSTAMP;TZID=IST:<apex:outputText value="{!SUBSTITUTE(SUBSTITUTE(SUBSTITUTE(TEXT(relatedTo.Demo_Start_Date__c),':',''),'-',''),' ','T')}"/>
UID:<apex:outputText value="{!relatedTo.id}"/>
DTSTART;TZID=IST:<apex:outputText value="{!SUBSTITUTE(SUBSTITUTE(SUBSTITUTE(TEXT(relatedTo.Demo_Start_Date__c),':',''),'-',''),' ','T')}"/>
DTEND;TZID=IST:<apex:outputText value="{!SUBSTITUTE(SUBSTITUTE(SUBSTITUTE(TEXT(relatedTo.Demo_End_Date__c),':',''),'-',''),' ','T')}"/>
SUMMARY: <apex:outputText value="{!relatedTo.Name}"/>
LOCATION: <apex:outputText value="{!relatedTo.Address__c}"/>BEGIN:VALARM
DESCRIPTION: Report Due Date:&nbsp;&nbsp;<apex:outputText value="{!relatedTo.Report_Due_Date__c}"/>
TRIGGER:-PT1D
ACTION:DISPLAY
END:VALARM
END:VEVENT
END:VCALENDAR 
</messaging:attachment>

You can see in the description that I have tried to add space between 'Report Due Date' and its value.

What should I do?

Answer 1

DESCRIPTION: <apex:outputText value="{!'Report Due Date: ' & relatedTo.Report_Due_Date__c}"/>

I changed my description to this and it worked!