Ensure a space before PDF arrays are written, even in non-verbose mode

[RenderMichael]

Fixes #442

According to the spec, section 7.5.5, the trailer dictionary is shown to be space separated. Unfortunately that's not explicitly stated, so perhaps PDF parsers should be able to accept the following line:

/ID[<FCEAE9E3BEA9864C83AA492B76687F02><FCEAE9E3BEA9864C83AA492B76687F02>]

However, if we think that a space after /ID is good, then this PR fixes that.

Before:

Before

%PDF-1.4
%����
1 0 obj
<<
/CreationDate(D:20240522141508-04'00')
/Creator<FEFF0050004400460073006800610072007000200031002E00350030002E0034003000300030002D006E00650074007300740061
006E00640061007200640020002800680074007400700073003A002F002F006700690074006800750062002E0063006F
006D002F007300740073007400650069006700650072002F005000640066005300680061007200700043006F00720065
0029>
/Producer(PDFsharp 1.50.4000-netstandard \(https://github.com/ststeiger/PdfSharpCore\))
>>
endobj
2 0 obj
<<
/Type/Catalog
/Pages 3 0 R
>>
endobj
3 0 obj
<<
/Type/Pages
/Count 1
/Kids[4 0 R]
>>
endobj
4 0 obj
<<
/Type/Page
/MediaBox[0 0 612 792]
/Parent 3 0 R
/Group
<<
/CS/DeviceRGB
/S/Transparency
>>
>>
endobj
xref
0 5
0000000000 65535 f 
0000000015 00000 n 
0000000477 00000 n 
0000000525 00000 n 
0000000580 00000 n 
trailer
<<
/ID[<FCEAE9E3BEA9864C83AA492B76687F02><FCEAE9E3BEA9864C83AA492B76687F02>]
/Info 1 0 R
/Root 2 0 R
/Size 5
>>
startxref
692
%%EOF

After:

After

%PDF-1.4
%����
1 0 obj
<<
/CreationDate (D:20240523110806-04'00')
/Creator <FEFF0050004400460073006800610072007000200031002E00350030002E0034003000300030002D006E00650074007300740061
006E00640061007200640020002800680074007400700073003A002F002F006700690074006800750062002E0063006F
006D002F007300740073007400650069006700650072002F005000640066005300680061007200700043006F00720065
0029>
/Producer (PDFsharp 1.50.4000-netstandard \(https://github.com/ststeiger/PdfSharpCore\))
>>
endobj
2 0 obj
<<
/Type /Catalog
/Pages 3 0 R
>>
endobj
3 0 obj
<<
/Type /Pages
/Count 1
/Kids [4 0 R]
>>
endobj
4 0 obj
<<
/Type /Page
/MediaBox [0 0 612 792]
/Parent 3 0 R
/Group
<<
/CS /DeviceRGB
/S /Transparency
>>
>>
endobj
xref
0 5
0000000000 65535 f 
0000000015 00000 n 
0000000480 00000 n 
0000000529 00000 n 
0000000586 00000 n 
trailer
<<
/ID [<6751B1FD3ECE5F4FAA48B04D7CC83F7D><6751B1FD3ECE5F4FAA48B04D7CC83F7D>]
/Info 1 0 R
/Root 2 0 R
/Size 5
>>
startxref
702
%%EOF

[ststeiger]

Merged.